John McCain's Republican primary challenger said Thursday he regrets taping an infomercial on behalf of a company accused of taking advantage of consumers.

Sen. John McCain will be campaigning in Yuma in southwestern Arizona on Friday. The senator will open his Yuma County Campaign Office and then head to Armed Forces Park to receive an award from the county Chamber of Commerce.

A serious re-election fight wasn't what Republican John McCain expected when he returned to the Senate after losing the presidency.

Arizona Sen. John McCain plans to launch new radio and television ads Thursday that blast his primary opponent for supporting special funding requests known as earmarks, his campaign said.